Design concept Flat trailer, non-power trolley is tow by other machine such as tractor, locomotive and forklift, which have been widely applied in the cargo transportation in the airport, sea port, warehouse, train station. In order to keep stable and flexible during the turning in small space, we have optimized the steering mechanism, wheel press and frame rigidity to make it available for linkage of several trolleys. The trolley has been highly approved by our customers.